Results 251 to 260 of about 177,176 (286)

Solar magnetic fields: triple arcade structures

Physica Scripta, 1998
Recent observation with the LASCO coronagraph on board the SOHO spacecraft have shown that helmet streamers may have an internal triple arcade structure. The observations suggest that this triple structure might be important for the initiation of coronal mass ejections (CME's). In this paper we undertake a first step towards the theoretical description
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Magnetic fields in the solar photosphere

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2008
Recent high-resolution observations of the surface of the Sun have revealed the fine structure of a vast array of complex photospheric magnetic features. Observations of these magnetic field structures have already greatly enhanced our theoretical understanding of the interactions between magnetic fields and turbulent convection, and future ...
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Solar magnetic fields and convection

Astrophysics and Space Science, 1977
The solar magnetic fields observed in active regions and their residues are thought to be parts of toroidal field systems renewed every 11-yr cycle from a poloidal field. The latter may be either a reversing (dynamo) field or a non-reversing, primordial field.
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Generation of Solar Magnetic Fields I

1983
In this lecture we continue our discussion concerning the generation of magnetic fields from the motion of conducting fluids. We proposed the “short sudden” idealization, which led to equation (17) in the preceding lecture. Vj in that equation is the large scale, steady fluid velocity that continually shears the field.
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Magnetic Fields and Solar Activities

Astrophysics and Space Science, 2006
We discuss the study of solar magnetic fields based on the photospheric vector magnetograms of solar active regions which were obtained at Huairou Solar Observing Station near Beijing in the period of 22nd and 23th solar cycles. The measurements of the chromospheric magnetic field and the spatial configuration of the field at the lower solar atmosphere
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Studies of solar magnetic fields

Solar Physics, 1977
An estimate of the average magnetic field strength at the poles of the Sun from Mount Wilson measurements is made by comparing low latitude magnetic measurements in the same regions made near the center of the disk and near the limb. There is still some uncertainty because the orientation angle of the field lines in the meridional plane is unknown, but
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Measurement of solar magnetic fields

Annual Meeting Optical Society of America, 1988
We review the use of polarimetric techniques in measurements of the magnetic field in the sun’s atmosphere. The basic principles of the inverse Zeeman effect and the radiative transfer of polarized light are presented to demonstrate how the vector magnetic field on the sun can be determined in magnitude and direction from measurements of the Stokes ...
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Solar force-free magnetic fields

Living Reviews in Solar Physics, 2021
Thomas Wiegelmann, Takashi Sakurai
exaly  

Magnetic resonance linear accelerator technology and adaptive radiation therapy: An overview for clinicians

Ca-A Cancer Journal for Clinicians, 2022
William A Hal, X Allen Li, Daniel A Low
exaly  

Interchange reconnection as the source of the fast solar wind within coronal holes

Nature, 2023
Stuart D Bale, James F Drake, Michael D Mcmanus   +2 more
exaly